Of course, she sported her trademark bouncy waves and didn't forget her megawatt smile for the event, which was packed with inspirational speakers and hosted by the UK TV show Strictly Come Dancing's former contestant, Kate Silverton. Tonight's 100 Women in Finance gala dinner is raising money for mental health initiatives in schools.
The Duchess of Cambridge arrives at a dinner at the Victoria and Albert museum.
Following her introduction from Kate Silverton the Duchess of Cambridge delivered a speech thanking those who were there in helping to improve mental health in schools.
The Duchess shared her own experiences of motherhood during the discussion: "When I first started out and I've learnt a lot in a short period of time working with organisations, I was very naive myself as a parent, of really just how important particularly the early years are for children's futures".
Meanwhile, Prince William was once again seen crouching down to be on the same level as Prince George when they attended Princess Charlotte's christening in 2015.
She also took the stage during the conference to speak about the importance of mental health education and training.
Introducing the Duchess today, Silverton said: 'As you all know (she) has been a great driving force behind much of the royal foundation supporting children in their earliest years.
"It is also clear that the positive development of our children is directly linked to those who care for them, teachers, carers and parents".